Replaceable air filter



FIG. 1 is a perspective view of the bottom of the replaceable air filter;

FIG. 2 is a perspective view of the top thereof;

FIG. 3 is a bottom plan view thereof;

FIGS. 4 and 5 are edge views thereof; (all edges are similar)

FIG. 6 is a top plan view thereof; and

FIG. 5 is a left side view thereof; the other side is a mirror image. 

The ornamental design for a replaceable air filter, substantially as shown and described. 